Coil Formers

Coil formers are components found in a transformer(an electrical device that transfers energy between two or more circuits). They're commonly used in electrical printed circuit boards(PCBs) to produce the energy needed to power electrical machines such as motors and generators.

Coil former applications

Coil formers are commonly used in transformers or as reactors in switch-mode power supplies. Transformers are used to bring voltage up or down in an AC electrical circuit. Both transformers and switch-mode power supplies can be used to convert mains AC power to DC power.

There are transformers all over every house. They are inside the chargers used to charge your mobile phone and other personal computing devices. They're also found in loudspeakers and microphones.

Advantages of using coil formers

  • Coil formers come in different types depending on whether you need to mount them horizontally or vertically.
  • Coil formers are usually made with an insulating material, such as thermosetting plastic, and are resistant to soldering and soldering heat.

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Description Price Accessory Type For Use With Dimensions Number of Pins Material Depth Length Width Maximum Temperature
RS Stock No. 125-3669
Mfr. Part No.B66359W1013T001
BrandEPCOS
SGD2.011
Each (In a Pack of 10)
units
Horizontal Coil Former ETD 29/16/10 Core - 13 GFR Polyterephthalate - 35.3mm 35.2mm +155°C
RS Stock No. 170-1440
Mfr. Part No.B65812N1012D001
BrandEPCOS
SGD1.08
Each (On a Reel of 200)
units
Vertical Coil Former RM 8 Core - 12 GFR Thermosetting Plastic - - 16.9 (Dia.)mm +180°C
RS Stock No. 170-7490
Mfr. Part No.FS-2EFD-3009-30
BrandBlock
SGD7.512
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 170-1459
Mfr. Part No.B65840B1006D001
BrandEPCOS
SGD0.583
Each (On a Reel of 2000)
units
Horizontal Coil Former EP 7 Core - 6 GFR Thermosetting Plastic - 10.7mm 8.5mm +155°C
RS Stock No. 167-8580
Mfr. Part No.B65687A1018T001
BrandEPCOS
SGD11.66
Each (In a Box of 10)
units
PM 74/59 Coil Former B65686 85.5 x 57.3 x 57.8mm 18 GFR Polyterephthalate 57.8mm 85.5mm 57.3mm +155°C
RS Stock No. 840-7285
Mfr. Part No.FS-2E-4215-20
BrandBlock
SGD8.68
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 125-3337
Mfr. Part No.B65526B1010T001
BrandEPCOS
SGD1.558
Each (In a Pack of 20)
units
SMD Coil Former ER 11/5 Core - 10 GFR Liquid Crystal Polymer - 8.6mm 10.5mm +155°C
RS Stock No. 125-3607
Mfr. Part No.B65982E0012D001
BrandEPCOS
SGD2.798
Each (In a Pack of 5)
units
Vertical Coil Former PQ 50 x 50 Core - 12 PMC Thermosetting Plastic - 45.72mm 51mm -
RS Stock No. 161-7774
Mfr. Part No.FS-2E-3611-20
BrandBlock
SGD3.35
Each (In a Bag of 5)
units
E 36 FS-1E-36 - 16 - - - - -
RS Stock No. 125-3682
Mfr. Part No.B66372A2000T001
BrandEPCOS
SGD10.13
Each
units
Horizontal Coil Former E 70/33/32 Core - - Polyphenylene Sulphide - 46.5mm 89mm +155°C
RS Stock No. 125-3643
Mfr. Part No.B66306C1010T001
BrandEPCOS
SGD1.876
Each (In a Pack of 10)
units
SMD Coil Former E 13/7/4 Core - 10 GFR Liquid Crystal Polymer - 13mm 13mm +155°C
RS Stock No. 125-3693
Mfr. Part No.B66414B6008T001
BrandEPCOS
SGD1.649
Each (In a Pack of 10)
units
SMD Coil Former EFD 15/8/5 Core - 8 GFR Liquid Crystal Polymer - 15mm 16mm +155°C
RS Stock No. 167-8204
Mfr. Part No.B66396W1022T001
BrandEPCOS
SGD2.849
Each (In a Box of 75)
units
ETD 54 B66395 61.6 x 46 x 61.4mm 22 GFR Polyterephthalate 61.4mm 61.6mm 46mm -
RS Stock No. 125-3677
Mfr. Part No.B66364B1016T001
BrandEPCOS
SGD2.882
Each (In a Pack of 5)
units
Horizontal Coil Former ETD 39/20/13 Core - 16 GFR Polyterephthalate - 44.6mm 46.8mm +155°C
RS Stock No. 125-3385
Mfr. Part No.B65808N1006D002
BrandEPCOS
SGD1.424
Each (In a Pack of 10)
units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
RS Stock No. 840-7370
Mfr. Part No.FS-2ETD-5922-20
BrandBlock
SGD7.74
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 125-3358
Mfr. Part No.B65672B0000T001
BrandEPCOS
SGD0.52
Each (In a Pack of 25)
units
Vertical Coil Former P 26 x 16 Core - - GFR Polyterephthalate - - 20.9 (Dia.)mm +155°C
RS Stock No. 167-8512
Mfr. Part No.B65814C1512T001
BrandEPCOS
SGD1.375
Each (In a Box of 200)
units
RM 10 Coil Former B65813 33 x 23.3 x 18.75mm 12 GFR Polyterephthalate 18.75mm 33mm 23.3mm +155°C
RS Stock No. 161-7768
Mfr. Part No.FS-2E-7064-20
BrandBlock
SGD17.308
Each (In a Bag of 5)
units
E 70 FS-1E-7064-00 - - Ryton R-4 - - - -
RS Stock No. 212-6687
Mfr. Part No.B65816N1012D001
BrandEPCOS
SGD1.62
Each (In a Pack of 5)
units
RM 12 Coil Former B65815 - 12 GFR Thermosetting Plastic 18mm - - +180°C
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Description:
RM 14 coil formers from EPCOS are constructed from black GFR thermosetting plastic, which meets IEC 60085:H standards. The B65888C1512T001 version is suitable for power applications and has a GFR polyterephthalate construction meeting IEC60085:F. Both materials meet the UL94 V-0 ...
B66414W EFD 15/8/5 coil formers from EPCOS are ...
Description:
B66414W EFD 15/8/5 coil formers from EPCOS are constructed from GRF thermosetting plastic and feature 8 squared pins. They meet the UL 94 V-0 standard and have an insulation class of IEC 60085:H with a maximum operating temperature of +180°C. ...
FS-2E series size 55/28/21 ferrite transformer bobbins with ...
Description:
FS-2E series size 55/28/21 ferrite transformer bobbins with insulation according to class B and flammability to UL 94 V-0. These ferrite transformer bobbins are available as horizontal (stock number 840-7294) or vertical (stock number 840-7291) mount. Typical applications for these ...
FS-2E series size 65/32/27 ferrite transformer bobbin with ...
Description:
FS-2E series size 65/32/27 ferrite transformer bobbin with insulation according to class B and flammability to UL 94 V-0. This ferrite transformer bobbins is horizontal mounting. Typical applications for this ferrite bobbin includes transformers and inductors in switch mode power ...